-LRB- CNN -RRB- -- UEFA has opened disciplinary proceedings against Lazio over allegations a section of their supporters chanted racial abuse at Tottenham players in the Europa League on Thursday .

Aaron Lennon , Jermain Defoe and Andros Townsend appeared to be subjected to racist abuse -- including monkey chants -- during the goalless draw at White Hart Lane , a game that was watched by UEFA president Michel Platini .

Members of Football Against Racism in Football -LRB- FARE -RRB- who were at White Hart Lane plan to file reports to UEFA to assist with their investigation .

Romanian referee Ovidiu Alin Hategan and match delegate Adonis Procopiu have already submitted their reports of the match 's events .

Tottenham held by Lazio in Europa League

`` UEFA has opened disciplinary proceedings against S.S. Lazio for the improper conduct of the club 's supporters -LRB- racist behavior -RRB- during the UEFA Europa League group stage match on Thursday 20 September between Tottenham Hotspur FC and the Italian side , '' read a UEFA statement .

`` The UEFA Control and Disciplinary Body will deal with the case on 18 October 2012 . ''

Lazio could be hit with a fine of $ 26,000 if their fans are found guilty of racial abuse , while UEFA could also force the club to play their next game behind closed doors .

Racism remains `` significant '' problem in English football

Earlier this week Chelsea midfielder John Obi Mikel had to close his Twitter account after receiving racist abuse online .

Chelsea issued a statement condemning those responsible and has informed the police following the matter .

The statement read : `` We 've been made aware of racist tweets targeted at Mikel which are totally unacceptable , disgusting and abhorrent .

`` We 've informed the police and support taking the strongest possible action . ''

This season UEFA has fined Bulgarian side Levski Sofia $ 39,000 for racist behaviour by their fans during the club 's Europa League second qualifying round match .

Levski fans unveiled a racist banner during their game against Bosnia & Herzegovina 's Sarajevo on July 19 .

`` Fans should realise that the club is responsible for all of their extreme or irrational actions , '' Levski said in a statement .

Meanwhile on Thursday , two AIK Solna supporters suffered stab wounds while in Naples for their side 's Europa League game against Napoli .

A 41-year-old and a 23-year-old were both wounded in the leg , but the club do not believe the attack was football related .

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UEFA has opened disciplinary action against Lazio

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Move comes following Lazio 's goalless draw at Tottenham

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Italian club could be hit with $ 42,000 fine

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Bulgarian side Levski Sofia hit with $ 39,000 fine